Welcome to Welcome to

ILCWS2010 and ILC10ILCWS2010 and ILC10

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Hesheng ChenInstitute of High Energy Physics

Beijing 100049, China

Introduction of Introduction of Institute of High Energy Physics Institute of High Energy Physics

Outline• Introduction• BEPC/BEPCII • Daya Bay reactor neutrino experiment• Particle astrophysics

– Yanbgjing cosmic ray observatory– Space program

• Multiple discipline research • Chinese Spallation Neutron Source • Medium and long term plan• Close remarks: cooperation with JLAB

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Institute of Institute of High Energy PhysicsEnergy Physics

• Institute of Modern Physics: established at 1950• Institute of High Energy Physics: independent

Institute for Particle physics at 1973 → Comprehensive and largest fundamental

research center in China– 1250 employees, 2/3 of them are physicists and

engineers,– 450 PhD Students and postdoctors

• Goal of IHEP: multiple discipline research center based on large scientific facilities.

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Major research fields at Major research fields at IIHEPEP• Particle physics: Particle physics:

– Charm physics @ BEPC Charm physics @ BEPC – LHC exp.LHC exp.– Yangbajing cosmic ray observatory Yangbajing cosmic ray observatory – particle astrophysicsparticle astrophysics– physics: Daya Bay reactor physics: Daya Bay reactor exp. exp.

• Accelerator technology and applications Accelerator technology and applications – High Lumi. e+e- collider: BEPCII High Lumi. e+e- collider: BEPCII – High power proton acceleratorHigh power proton accelerator

• Radiation technologies and multidiscipline Radiation technologies and multidiscipline – Synchrotron radiation source and applicationsSynchrotron radiation source and applications– Spallation neutron source and application Spallation neutron source and application – Multiple discipline research: biology, nano-sciences, Multiple discipline research: biology, nano-sciences,

energy,environment……energy,environment……

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Beijing Electron Positron Collider (BEPC) at IHEP

BEPC: constructed 1984-1988 Ebeam~ 1–2.5 GeVBESI: run from 1989-1998BESII: run from 1999-2004

BECPII upgraded 2004-2008 Ebeam~ 1–2.3 GeVBESIII: run from 2008

-charm energy region

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precision measurement of mass: 10 times improved. Lepton universality!

R measurements improve uncertainties by a factor of 2-3 (R/R6%). Great impact to MH.Mz

2, g-2

Some new particles X(1835) observed. Hard to be interpreted as conventional hadrons. ppbar bound state?

Precision measurement requires high statistics and Precision measurement requires high statistics and small sys. errors →small sys. errors →

Major upgrade: BEPCII / BESIII (2004-2008)Major upgrade: BEPCII / BESIII (2004-2008)

With BESI and BESII data:

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BEPCII: a high luminosity double–ring collider

SC RF

Two rings

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The BESIII Detector

Be beam pipe

SC magnet, 1TMagnet yoke

MDC, XY (m) = 130P/P = 0.5 % (1 GeV)dE/dx = 6-7 %

CsI(Tl) calorimeter, E/√E = 2.5 % (1 GeV) z,(cm) = 0.5cm/√E

TOF, T (ps) = 100 ps Barrel

110 ps Endcap

RPC: 9 layers

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Joint Commissioning BESIII detector moved into the IR in May Joint commissioning started 22 June.

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• First physics event was detected at BESIII in July 19, 2008.• MDC noise problem was solved. • 10M ‘ events collected for calibration

DD)3770(

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BEPCII reached design goals on schedule within the budget

• Linac: positron injection rate improved by > factor of 15

• BESIII performance reached the design goals. • Synchrotron radiation running hard X-ray flux

increased by a factor of 10• luminosity of storage ring reached 3.2 ×1032cm-2s-1

May 2009. a factor of 32 improvement• BEPCII passed the assessment of the funding agency

July 17, 2009.• By summber 2009, 120M Ψ΄events and 200M J/ Ψ

collected/

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Main parameters achieved in collision mode

parameters design Achieved

BER BPR

Energy (GeV) 1.89 1.89 1.89

Beam curr. (mA) 910 650 700

Bunch curr. (mA) 9.8 >10 >10

Bunch number 93 93 93

RF voltage 1.5 1.5 1.5

s @1.5MV 0.033 0.032 0.032

x*/y

* (m) 1.0/0.015 ~1.0/0.016 ~1.0/0.016

Inj. Rate (mA/min) 200 e50 e+ >200 >50

Lum. ( 1033cm-2s-1) 1 0.33

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Preliminary physics results• Confirm BESII results

– threshold enhancement ppbar, X(1835), …

• Improved measurements– hc, c, cJ, , …

• New observations – cJ decays

– hc decays

– Light hadrons, …

• 3 papers accepted and 4 submitted

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Physics at BEPCII/BESIII Precision measurement of CKM matrix elements Precision test of Standard Model QCD and hadron production Light hadron spectroscopy Charmonium production/decays Search for new physics/new particles

Physics

Energy

(GeV)

Peak Luminosity

(1033 cm–2s –1)

Events/year Existing data

J/ 3.097 0.6 10×109 60×106 (BESII)

3.67(?) 1.0 12×106 --

’ 3.686 1.0 3×109 27 ×106 (CLEOc)14 ×106 (BESII)

D 3.77 1.0 3×106 5×106 (CLEOc)

Ds 4.03 0.6 1×106 4×103 (BESI)

Ds 4.17 0.6 3×106 0.3×106 (CLEOc)

R scan 3.0-4.6 0.6(?)-1.0 -- --

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Precision measurement of mixing 13: Daya Bay reactor experiment

• Daya Bay nuclear power plant: 4 reactor cores, 11.6 GW 2 more in 2011 for a total of 17.4 GW • Mountains near by, easy to construct a lab with enough

overburden to shield cosmic-ray backgrounds • 90% tunnel construction finished. Begin data taking with the

Near-Far configuration later 2011• Expect to reach sensitivity of 0.01 with 3 years of running.

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Experimental layout• Identical detector at

near and far site to perform relative measurement in order to cancel reactor related systematic error

• Experimental halls are connected by 3000m tunnel

• Signal rate：~1200/day Near~350/day Far

• Backgrounds：B/S ~0.4% NearB/S ~0.2% Far

Ling-Ao near：2 detector module40t target mass500m to Ling-Ao coreOverburden: 112m

far: 4 detector module80t target mass1600m to Ling-Ao core1900m to Daya Bay coreOverburden ： 350m

Daya Bay near：2 detector module40t target 360m to Daya Bay coreOverburden: 98m

Tunnel entrance

8% slope

0% slope

0% slope

0% slope

Construction tunnel

SAB Tunnel

EH 1Hall 5

LHC ExperimentsLHC Experiments

1. CMS (IHEP, Peking Univ.) – 1/3 of CSC at muon end caps (IHEP) – RPC of barrel muon (Beijing Univ.) – Physics and MC

2. Atlas (IHEP, USTC, Shandong Univ.,Nanjing Univ.)– Drift Monitor chambers (IHEP)– TGC (Shandong Univ.)– Physics and MC

3. LCG: Tier 24. LHCb: (Tsinghua Univ. )5. Alice: (Huazhong Normal Univ., CIAE)

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ILC R&D Activities

• SC cavities (also for next generation light source)• Dumping ring design• Positron source• detector R&D (IHEP and Tsinghua Univ.…) Other R&D: • works for EXFEL also very useful for ILC R&D• BEPCII spare cavity (500 MHz)At meantime, Chinese accelerator teams are heavy At meantime, Chinese accelerator teams are heavy

loaded with the domestic programs. China will be loaded with the domestic programs. China will be more active in R&D of ILC in near future. more active in R&D of ILC in near future.

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ILC cavity made by Chinese single crystal (collaborating with KEK Saito group)

47.9 MV/m （ after EP)

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Chemical Polishing Facility ( installed at IHEP)

Over flow Tank

Recirculation Pump

Main Acid Valve

AcidTank

Main Acid Pump

AcidSupply Tank

Acid Dump Tank

Acid Dump Valve

Acid Waste Barrel

Acid Dump Pump

Waste Gas Treatment

Dilute WasteBarrel

UPWTank

UPWPump

Ultra Pure Water (UPW)Barrel

UPWValve

Dilute Waste Valve

Cool water spray

配酸槽 高位水槽高位酸槽 酸雾塔纯水储槽

冷水机

3#风机液位控制槽

废酸储槽

泵泵

泵泵

排酸 排酸冷却器

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SCRF Test Facility is proposed

1.3 GHz SCRF Accelerating Unit and Horizontal Test Stand for

ILC, ERL and XFEL

Input coupler Cavity

Tuner

Cryomodule

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Multiple discipline research• Large Facilities:

– BSRF– CSNS– High current slow positron source– Beijing Advance Light Source (under discussion)

• Research fields: – Biology effects of nano-materials – Nuclear image and application– Protein structure and function– Environment studies with nuclear methods – Nano-material science– ……

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BEPC

4w1

Diffuse ScatteringX-ray fluorescence

analysis

Topography

4B9

X-ray DiffractionSmall angle scattering

Photoemission SpectroscPopy

3B1

Lithography

3W1

Middle energy

4W1B

4W1A

4B9B

4B9A3B

1B

3B1A

3W1A

3W1B

6 wigglers and 14 beam lines. > 500 exp./year from > 100 institutions

Beijing Synchrotron Radiation Facility

250mA@2.5GeV

1W1A

XAFS1W1B

High-pressure diffraction

LIGA

VUV

Macromolecular

3B3

1w1

4w2

3B3

Soft X-ray Optics

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Chinese Spallation Neutron Source (CSNS)

Facility layout

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Status of CSNS• Proposal approved. • Feasibility study report approved. • Preliminary designs are ready, reviews are underway.• IHEP is in charge of the project with cooperation with Inst. of

Physics. • CSNS will be a branch of IHEP • Budget: 1.4B RMB + the fund (0.5B) & the free land from the local

governments • Construction and commissioning: 6.5 year • Major project for machine team and detector team after

BEPCII/BESIII• Design and R&D are going smoothly. many prototypes are under test.

Chinese Particle Physics projects Chinese Particle Physics projects in medium and long term plan in medium and long term plan • Charm physics @ BEPCII: next 8 years or more • Intl. collaborations: LHC exp., ILC… • Particle Astrophysics exp. at Space

– Modulated hard X-ray telescope satellite– SVOM– Polar @ Chinese Spacelab.: polarization of burst

• Cosmic ray measurement – Yangbajing Cosmic ray Observatory: LHAASO

• Neutrino experiments: – Daya Bay Reactor neutrino exp.:

• Deep underground Lab.: dark matter search• South pole Dome A: 4m telescope (under discussion)

Chinese Particle PhysicsChinese Particle Physics Medium and Long Term Plan Medium and Long Term Plan (cont.)(cont.)

• High power proton Accelerator: – Chinese Spallation Neutron Source– Accelerator Driven Subcritical system

• Beijing Advance Light Source ERL + XFEL

IHEP extents research fields, to protein structure, nano-science, material science…

→ Multiple discipline research center

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XFEL(6~8GeV)

250MeV LINAC

Main RingE=5GeV-3GeVC=1200m-800mε~1nm

5GeV LINAC

ERL recirculation arc=Booster

Gun1BC1Gun2BC2 700m 650m

Return transporttest

BoosterC~300m

550

m

Beijing Advanced Photon Complex

Phase I: Low emittance Synchrotron Radiation source BAPS， 5GeV, 100-200mA, 1nm.rad, 2013-2018Phase II: X-ray FEL (BXFEL)0.15 nm, 6~8 GeV, 2017-2022Phase III: X-ray Energy Recovery LINAC source, BXERL, 2022-

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Thank you for attention !Thank you for attention !

Wish the workshop with great successWish the workshop with great success

Pleasant Stay in Beijing !Pleasant Stay in Beijing !